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(No Model.)

' G. SGHRADE.

POCKET KNIFE.

N0. 470,605.. Patented Mar. 8, 1892-.

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York, have invented a new and useful Imopen and closed adjustment.

NITED STATES I PATENT OFFICE.

GEORGE SOHRADE, OF NEW YORK, N. Y., ASSI GNOR TO GOTTLIEB SGHRADE,

' 0F SAME PLACE.

POCKET-KNIFE.

SPECIFICATION forming part of Letters Patent No. 470,605, dated March 8, 1892. Application filed December 4:, 1891. Serial 110,413,980. (No model.)

To all whom it may concern:

Be-it known that I, GEORGE SOHRADE, of New York, in the county and State of New provement in Pocket-Knives, of which the following is a specification.

My invention relates to an improvementin pocket-knives in which provision is made for the automatic opening of the blade when released and for locking the blade in both its A practical embodiment of my invention is represented in the accompanying drawings, in Which- Figure l is a view of the knife in side elevation, a portion of the mounting being removed to show the locking and releasing spring. Fig. 2 is a longitudinal sectional View taken in the plane in which the blade swings. Fig. 3 is a transverse longitudinal section. Fig. eis a longitudinal section showing the blade provided with cam-bearing for the actuating-spring, and Fig. 5 is a view in detail of the locking and releasing spring employed in connection with the form of shank shown in Fig. 4. i

The sides of the casing are represented by A and A, and its back by a. The sides and back are preferably formed of a single piece of metal. The mountings B and B may be of pearl, bone, wood, or any other suitable material.

The bladeis represented by C, and its shank by c. The ring 0 of the blade is pivotally secured in position between the sides of the easing by a hollow pivot D. The shank c is provided with recesses c and 0 located upon opposite sides of the pivot D and adapted to receive a locking-pin, the one 0' to hold the blade closed and the other e to hold it open. The recesses c and c are here shown as circular; but it is obvious that they might be oval or any desired polygonal shape in cross section.

A locking-spring, consisting of a plate or bar spring E, is secured at one of its ends to the side of the casing, as shown at e, its opposite end being provided with a stud e,

adapted to project through the side of the easing and into the one or the other of the recesses c or 0 according asthe blade is closed or open. The spring E is further prov ded with an operating pin 8 which pro ects through the hollow pivot D into a recess a formed in the mounting B and in such position that it maybe pressed uponby the finger to throw the spring E away from the side of the casing, and thereby withdraw the stud e from the recess in the shank of the blade. The mounting B is provided with a recess 1) to permit the movement of the free end of the spring E away from the side of the casing.

The actuating-spring for throwing the blade when released from its closed to its opened position is represented by F in Figs 1, 2, 3, and 4. It consists of abar-spring having one of its ends at the inner face of the back of the casing bent to form a pair of ridges f, between which a stud or pin f extends transversely across the casing, and thereby secures the spring in position. The free end of the spring bears against the under side of the shank of the blade, as clearly shown in Fig. 2, its tension being exerted in a direction to throw the blade up from the casing and over into an extended or open position.

In the form shown in Fig. ithe shank of the blade is provided with a cam-face 0 along which the free end of the actuating-spring F rides as the blade 0 swings open, the spring itself when the blade is full open having a tendency to keep it open. In this form, where the shank is cut away to form the cam-face, I find it desirable to provide only one recess 0' for the reception of the locking-stud on the spring and to provide the spring with an additional locking-stud a (see Fig. 5,) which when the blade is swung full open is received into the same recess 0 in the shank of the blade which receives the locking-stud. b when the blade is closed.

While I have shown a single blade secured to one end of the casing, it is obvious that another blade might be similarly'secured at the other end of the casing and operated in a manner quite similar to that shown and described with respect to the blade 0.

What I claim is- 1. The combination, with the casing, the pivoted blade, and its actuating-spring tending, to throw the blade open, of a lockingspring having an engagement with the shank of the blade to lock it in closed and open adjustrnent, and the push-pin located within the pivotal connection of the blade, with the casing for operating thelocking-spring, substantially as set forth.

2. The combination, with the casing, the blade pivoted therein, provided with a cam surface on its shank, and the blade-actuating" spring having an engagement with the camface on the shank, of a locking and releasing" spring secured to the casing and provided with studs, one in position to engage the blade When closed and the other in position to engage the blade when open, and a push-pin located within the pivotal connection with the blade and the casing, substantially as set forth.

GEORGE SCHRADE. Vitnesses:

FREDK. HAYNES, G. E. SUNDGREIT.

Correction in Letters Patent No. 470,605.

"It is hereby certified that in Letters Patent No. 470,605, granted March 8, 1892 npon the application of George Schrade, of New York, N. Y., for an improvement in Pocket-Knives, an error appears in the printed specification requiring correction as follows: In line 5, page 2, the comma after the vyord. blade should be stricken out and p that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed, countersigned, and sealedthis 15th day of March, A. D. 1892.

oYBUs BUSSEY;

[SEAL.]

Assistant Secretary of the Interior. Gountersi gn ed:

W. E. SIMoNDs,

Commissioner of Patents. 

